Direct bury insulated steam line

[Patrick LaPointe]

Does anybody have any experience with direct bury insulated steam line? My application is a 4" X Sch 40 steam line at 300 psig and 430 degrees F. The bury length of the line is approximately 450 feet. The line has a 410 foot radius, 53 degree arc. My intention is to insulate the line with 3" of FOAM GLAS (which is fairly rigid) insulation. The insulation will be covered with SS cladding. The bury length of the line is not long enough to fully develop a virtual anchor. I am aware that I can used Ultra-Therm (aka Ricwil) pre-insulated pipe but I would like to explore the possibility of direct bury.

 

[Dhurjati Sen]

Dear Patrick LaPointe,

Can't you make it above ground?

Regards.

DHURJATI SEN
Kolkata, India

 

[LittleInch]

So you have a horizontal elastic bend of about 1200D.

I don't understand why you're covering the Foam glass with SS - FG is impervious to water and is normally just wrapped.

What is the question?
If it's can you bury it the answer is yes.

Remember - More details = better answers
Also: If you get a response it's polite to respond to it.

 

[mk3223]

Some good references for this topics below:

thread378-22215
thread378-263964
thread124-329849